"Missing shader extensions" crash, OGL2

I've downloaded all the shaders on pete's site and tried putting them in a 'shaders' subdirectory in my epsxe folder, but still whenever I try to run a game, I get the error message "Missing shader extensions!" followed by "No buffer available!" and then epsxe crashes alltogether.

I'm running ePSXe 1.60, with Pete's OpenGL Driver v2.6 with screen filtering on and shader effects 1/4 (fullscreen smoothing, maximum).

Help would be much appreciated

-floatingpoint